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On Total Annoyance Caused by Different Environmental Sounds : a Review and Suggestions for Additional Research
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2014 |
| Abstract | Various procedures for rating total annoyance caused by different environmental sounds have been proposed. It is explained that the adequacy of the majority of these models is very limited. A more promising weighted summation model is described in which for each single source in the combination, the sound exposure will be first expressed as the level of equally annoying road-traffic sound. Next, weighted summation of the adjusted levels results in the total rating sound level. The model successfully explained total annoyance ratings obtained in the laboratory for various combinations of different simultaneously presented sounds. To explore the general applicability of the model, suggestions for additional research are given. 1 INTRODUCTION A considerable part of the population is exposed to simultaneous and/or successive environmental sounds from different sources. To prevent or reduce the annoyance in areas with two or more different sound sources, insight is needed into the population’s total annoyance caused by all sounds together. Any procedure for rating combined environmental sounds should meet at least a few requirements. Firstly, the procedure must be able to cope with the systematic differences among the (source-specific) dose-response relationships for the constituting sources. At the same A-weighted equivalent sound pressure levels (ALEQ), aircraft sounds are more annoying, and railway sounds are less annoying than road-traffic sounds (e.g., see [1]). Similarly, shooting sounds produced by small firearms are more annoying than road-traffic sounds (e.g., see [2]). The comparability among the community response to environmental sounds can be increased by adding adjustments to the noise dose, relative to the doseresponse relationship for road-traffic sounds (e.g., see the new ANSI method described in [3]). If single event level and number of events are exchangeable, as it is assumed to be the case for traffic sounds and the impulse sounds produced by small firearms, the adjustments may be directly applied to ALEQ. For shooting sounds produced by medium-large and large firearms, and for other high-energy impulsive sounds, the adjustments should be directly applied to the sound exposure level of the single events (e.g., see [4-8]). It is assumed here that total annoyance is related to a weighted sum of the adjusted sound levels. Secondly, the total rating sound level for multiple sound sources should never be lower than the rating sound level for the more annoying source. Stated differently, a procedure that predicts total annoyance from multiple sources to be lower than the maximum of the source-specific annoyance of the separate sources, is regarded as being invalid and must therefore be rejected. Examples of models that do not meet both requirements just described (also see [9]), are the response summation model [10], the summation and inhibition model [11], and the energy summation or energy difference models [12]. Both requirements are satisfied in a weighted summation model with the general formula |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.conforg.fr/internoise2000/cdrom/data/articles/000946.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
